Question

long division with decimals
it is very easy to use long division to divide a decimal by a whole number.
during the division process, divide as if there were no decimal point.
then, simply put the decimal point in the quotient in the same place as it was in the dividend.

1. divide. check each division result with multiplication.

a. 5)5.30 check:
b. 3)0.72 check:
c. 7)6.23 check:
d. 6)2.388 check:

Explanation:

Step1: Divide 5.30 by 5

Divide 530 by 5 ignoring the decimal point first: $530\div5 = 106$. Then put the decimal point in the quotient in the same place as in the dividend, so $5.30\div5=1.06$.
Check: $1.06\times5 = 5.30$

Step2: Divide 0.72 by 3

Divide 72 by 3 ignoring the decimal point: $72\div3 = 24$. Then place the decimal point, so $0.72\div3 = 0.24$.
Check: $0.24\times3=0.72$

Step3: Divide 6.23 by 7

Divide 623 by 7 ignoring the decimal point: $623\div7 = 89$. Then place the decimal point, so $6.23\div7 = 0.89$.
Check: $0.89\times7 = 6.23$

Step4: Divide 2.388 by 6

Divide 2388 by 6 ignoring the decimal point: $2388\div6=398$. Then place the decimal point, so $2.388\div6 = 0.398$.
Check: $0.398\times6=2.388$

Answer:

a. $5.30\div5 = 1.06$, Check: $1.06\times5 = 5.30$
b. $0.72\div3 = 0.24$, Check: $0.24\times3=0.72$
c. $6.23\div7 = 0.89$, Check: $0.89\times7 = 6.23$
d. $2.388\div6 = 0.398$, Check: $0.398\times6=2.388$